Search results for "Movement planning"

showing 3 items of 3 documents

Pointing to double-step visual stimuli from a standing position: motor corrections when the speed-accuracy trade-off is unexpectedly modified in-flig…

2011

The time required to complete a fast and accurate movement is a function of its amplitude and the target size. This phenomenon refers to the well known speed-accuracy trade-off. Some interpretations have suggested that the speed-accuracy trade-off is already integrated into the movement planning phase. More specifically, pointing movements may be planned to minimize the variance of the final hand position. However, goal-directed movements can be altered at any time, if for instance, the target location is changed during execution. Thus, one possible limitation of these interpretations may be that they underestimate feedback processes. To further investigate this hypothesis we designed an ex…

AdultMaleVisual perceptionComputer sciencemedia_common.quotation_subjectMovementMotion PerceptionTrade-offHand positionExecutive FunctionYoung AdultControl theoryFeedback SensoryPerceptionOrientationReaction TimeHumansmedia_commonCommunicationbusiness.industryGeneral NeuroscienceGRASPHandAmplitudeSpeed accuracybusinessMovement planningPsychomotor PerformanceNeuroscience
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In vivo definition of parieto-motor connections involved in planning of grasping movements

2010

We combined bifocal transcranial magnetic stimulation (TMS) and diffusion tensor imaging (DTI) tractography to investigate in humans the contribution of connections originating from different parietal areas in planning of different reaching to grasp movements. TMS experiments revealed that in the left hemisphere functional connectivity between the primary motor cortex (M1) and a portion of the angular gyrus (AG) close to the caudal intraparietal sulcus was activated during early preparation of reaching and grasping movements only when the movement was made with a whole hand grasp (WHG) towards objects in contralateral space. In contrast, a different pathway, linking M1 with a part of the su…

Malegenetic structuresCognitive Neurosciencemedicine.medical_treatmentIntraparietal sulcusMotor Activitybehavioral disciplines and activitiesFunctional LateralityLateralization of brain functionNOSuperior longitudinal fasciculusAngular gyrusYoung AdultSupramarginal gyrusParietal LobeNeural PathwaysmedicineHumansYoung Adult; Diffusion Tensor Imaging; Humans; Hand; Motor Skills; Parietal Lobe; Frontal Lobe; Motor Cortex; Evoked Potentials Motor; Motor Activity; Neural Pathways; Psychomotor Performance; Transcranial Magnetic Stimulation; Female; Functional Laterality; MaleEvoked PotentialsConnectivitySettore M-PSI/02 - Psicobiologia E Psicologia Fisiologicamusculoskeletal neural and ocular physiologySuperior longitudinal fasciculusMotor CortexEvoked Potentials MotorHandTranscranial Magnetic StimulationFrontal LobeTranscranial magnetic stimulationTMS Connectivity Movement planning Superior longitudinal fasciculusTractography Transcranial magnetic stimulationDiffusion Tensor Imagingmedicine.anatomical_structureConnectivity; Movement planning; Superior longitudinal fasciculus; TMS; Tractography; Transcranial magnetic stimulation;Motornervous systemNeurologyMotor SkillsMovement planningTMSFemaleSettore MED/26 - NeurologiaPrimary motor cortexPsychologyTractographyNeurosciencePsychomotor Performancepsychological phenomena and processesTractographyNeuroImage
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Movements Execution in Amnestic Mild Cognitive Impairment and Alzheimer’s Disease

2007

We evaluated the relationship between motor and neuropsychological deficits in subjects affected by amnestic Mild Cognitive Impairment (aMCI) and early Alzheimer’s Disease (AD). Kinematics of goal-directed movement of aMCI and AD subjects were compared to those of age-matched control subjects. AD showed a slowing down of motor performance compared to aMCI and controls. No relationships were found between motor and cognitive performances in both AD and aMCI. Our results suggest that the different motor behaviour between AD and aMCI cannot be related to memory deficits, probably reflecting the initial degeneration of parietal-frontal circuits for movement planning. The onset of motor dysfunct…

Malemedicine.medical_specialtyMild Cognitive ImpairmentMotor dysfunctionneuropsychologyNeurosciences. Biological psychiatry. NeuropsychiatryDiseaseAudiologyNeuropsychological TestsMotor behaviourSeverity of Illness Indexbehavioral disciplines and activitiesAlzheimer Diseasemental disordersmedicineReaction TimeHumansBiomechanicsClinical NoteAlzheimer’s DiseaseCognitive impairmentalzheimer's disease mild cognitive impairment kinematicsAgedDemographypointingMovement DisordersNeuropsychologyCognitionGeneral MedicineControl subjectsBiomechanical PhenomenaSeverity of Illness Index; Humans; Alzheimer Disease; Aged; Mental Recall; Cognition Disorders; Demography; Movement Disorders; Neuropsychological Tests; Amnesia; Biomechanics; Female; Male; Reaction TimeNeuropsychology and Physiological PsychologyNeurologykinematicsMental RecallSettore MED/26 - NeurologiaFemaleNeurology (clinical)AmnesiaPsychologyCognition DisordersNeuroscienceMovement planningRC321-571Behavioural Neurology
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